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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 05-04-08, 12:04 PM   #1
CrimsonEclipse
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Tell me about cranksets.

Most of my exposure has been with standard 44-32-22 MTB cranksets
that are throwaway.

I am interested in finding shorter crank arms (around 160mm) and I have a few questions.

I see the crank arms for sale and I see BMX Road and MTB. Is there a major difference
between the three?

Bolt holes: is there a standard bolt pattern or size or several standards?

Anything else I should know?

CE

P.S.

Is there a leg inseam to crank set length cart or guideline?
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Old 05-04-08, 09:22 PM   #2
kramnnim
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Yeah, there's generally quite a difference among the three types...including the bolt circle diameter, as well as chainline specs, single/double/triple, etc... It would be best to use the matching crank for the type of bike... (there's exceptions, of course...)
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